#!/usr/bin/env python3
"""Aggregate test runner for the backend suite.

The backend tests are standalone scripts (each with `if __name__ == "__main__"`, no
pytest). This discovers every backend/**/test_*.py and runs each in its OWN subprocess
(tests set os.environ and import `server` with different configs, so isolation matters),
prints a one-line PASS/FAIL per test, dumps output only for failures, and exits non-zero
if any test fails.

Run:  python3 backend/run_tests.py        (from the repo root)
  or: cd backend && python3 run_tests.py
Filter: python3 backend/run_tests.py soft_delete redaction   # substring match on path
"""
import os
import subprocess
import sys
import time

BACKEND = os.path.dirname(os.path.abspath(__file__))


def discover(filters):
    found = []
    for root, dirs, files in os.walk(BACKEND):
        dirs[:] = [d for d in dirs if d != "__pycache__"]
        for f in files:
            if f.startswith("test_") and f.endswith(".py"):
                path = os.path.join(root, f)
                rel = os.path.relpath(path, BACKEND)
                if not filters or any(flt in rel for flt in filters):
                    found.append(path)
    return sorted(found)


def main():
    filters = sys.argv[1:]
    tests = discover(filters)
    if not tests:
        print("No tests matched.")
        sys.exit(1)
    print(f"Running {len(tests)} backend test(s)\n")

    passed, failed = [], []
    t0 = time.time()
    for path in tests:
        rel = os.path.relpath(path, BACKEND)
        proc = subprocess.run([sys.executable, path], cwd=BACKEND,
                              stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
        if proc.returncode == 0:
            passed.append(rel)
            print(f"  PASS  {rel}")
        else:
            failed.append(rel)
            print(f"  FAIL  {rel}")
            sys.stdout.write(proc.stdout.decode("utf-8", "replace").rstrip() + "\n")

    print(f"\n{len(passed)}/{len(tests)} passed in {time.time() - t0:.1f}s")
    if failed:
        print("FAILED:")
        for f in failed:
            print(f"  - {f}")
        sys.exit(1)
    print("ALL PASS")


if __name__ == "__main__":
    main()